- published: 23 May 2014
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Rayleigh scattering (pronounced /ˈreɪli/ RAY-lee), named after the British physicist Lord Rayleigh (John William Strutt), is the (dominantly) elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the radiation. Rayleigh scattering does not change the state of material, hence it is a parametric process. The particles may be individual atoms or molecules. It can occur when light travels through transparent solids and liquids, but is most prominently seen in gases. Rayleigh scattering results from the electric polarizability of the particles. The oscillating electric field of a light wave acts on the charges within a particle, causing them to move at the same frequency. The particle therefore becomes a small radiating dipole whose radiation we see as scattered light.
Rayleigh scattering of sunlight in the atmosphere causes diffuse sky radiation, which is the reason for the blue color of the sky and the yellow tone of the sun itself.
This is just a mock up, it was never used in a presentation. We were trying to explain scattering in a physical way that makes sense to kids, but also addresses the 1/λ4 wavelength dependence. I want to make clear that I mean blue light is scattering much much more than red, the photon does not partially scatter and continue to move in the same direction. Also, we have already addressed the reason the sky isn't perceived as violet which is why it isn't included. Mie scattering is another video, and perhaps a discussion of light incident could help explain the colors we see at different times of the day. Overall, the physics of light are pretty complex and cool. Maybe we'll do an animation on thin film interference.
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain Rayleigh scattering and why is the sky blue? Next video in the Particle Physics series can be seen at: http://youtu.be/uetMkaWUFTs
This video describes the science of how Rayleigh scattering leads to blues and reds visible in the sky. It will incorporate ideas about white light, additive color, sun-Earth geometry, and scattering. Why is the sky blue? Search no further. Visit https://sites.google.com/site/dcaulfssciencelessons/ for more! The video also makes use of computer simulations created by: PhET Interactive Simulations University of Colorado http://phet.colorado.edu.
Cuando la luz incide sobre partículas cuyo tamaño es muy inferior al de la longitud de onda, esa luz se dispersa en razón inversa a la cuarta potencia de la longitud de onda. En la atmósfera, la dispersión de la luz por las moléculas del aire es la causa del color azul del cielo.
PHYSICS (Grade 12): High School Learning: Polarization and Scattering | Rayleigh law of scattering | Malus law | Plane of polarization Polarization and scattering, What is polarization, Description about the Polarized light, How polarized light forms, Linearly polarized light, Electrically polarized light, Circulatory polarized light, How we can filter the polarized light, What is Malus law, What is Brewster's angle, Plane of polarization, What is scattering of light, Demonstration of the Scattered light, Rayleigh law of scattering Video by Edupedia World (www.edupediaworld.com), Online Education, All Right Reserved.
For the experiment I used a glass of water, a white light source, a white screen, sodium thiosulfate and sulfuric acid. To create a colloidal sodium I dissolved thiosulfate in water, then I added a little sulfuric acid.I lit the solution obtained and found out that light from the glass is blue and the light that reaches the screen is yellow to reddish. So we can say that solution is like sky, obtaining a bluish color, and arrived bright spot on the screen is similar to the sun during sunset. Also scattered light perpendicular to the incident light is partially polarized incident, which I highlighted with a polarizing filter.
Explicado por el gran Walter Lewin, Doctor en Física y exprofesor emérito de física del MIT.
Original video source: http://www.exfo.com/Support-and-Services/Be-an-Expert-Training-Program/Animated-Optical-Glossary/ The elastic distribution of light in all directions, which is caused by interference with particles smaller than the wavelength of the light itself. EXFO's Be-an-Expert Program has produced the world's first animated glossary of fiber optic terms. Including concise definitions and animated sequences, this tool provides a great reference for anyone that wishes to understand fiber terminology.
Accelerated Charges - Poynting Vector - Power - Rayleigh Scattering - Polarization - Why is the sky Blue - why are Clouds White? Why are Sunsets red? Assignments Lecture 13 and 14: http://freepdfhosting.com/924d1cc8e9.pdf Solutions Lecture 13 and 14: http://freepdfhosting.com/8604fe3059.pdf
eBm vs Rayleigh Scattering (UGC silver team) Casted from http://www.twitch.tv/tronpaul
Tracklist: 01 00:00 - Shinobi - Rayleigh Scattering 02 03:55 - H-Pizzle - Lunar Escape 03 08:04 - +tek - super-reflex 04 11:41 - Zackery Wilson - RIGHT Off the Bat(tle) 05 14:01 - Stinkbug - starlight mall 06 19:09 - Metatronaut - Metatron 07 23:25 - Mark 'TDK' Knight - Nicotine Pang 08 27:35 - simonstalenhag - Ripple Boogie 09 30:49 - Jakim - Inner Child 10 33:54 - Twistboy - Circumstances 11 37:45 - SolarLune - Bitrate 12 40:30 - Inkey - do or pie 13 42:17 - C-jeff - The Hearts Of Everyone Shinobi: http://soundcloud.com/shinobimar H-Pizzle: http://hpizzle.bandcamp.com/ +tek: http://soundcloud.com/plrusek-chan Zackery Wilson: http://www.zackerywilson.com/ Stinkbug: http://soundcloud.com/stinkbug Metatronaut: https://metatronaut.bandcamp.com/ TDK: http://marktdkknight.bandcamp.com/ Simons...
Subject: Chemistry Paper : Physical Spectroscopy
Particle Characterization by Dr. R. Nagarajan, Department of Chemical Engineering, IIT Madras.For more details on NPTEL visit http://nptel.iitm.ac.in
Super High Voltage - Why is the Sky Blue - Why are the Clouds White and Why are the Sunsets REd?
On May 16, 2011, Professor of Physics Emeritus Walter Lewin returned to MIT lecture hall 26-100 for a physics talk and book signing, complete with some of his most famous physics demonstrations to celebrate the publication of his new book For The Love Of Physics: From the End of the Rainbow to the Edge of Time - A Journey Through the Wonders of Physics, written with Warren Goldstein. Note: Due to a serious complaint against Dr. Lewin, MIT has revoked Dr. Lewin's title of Professor Emeritus as of December 2014. See https://newsoffice.mit.edu/2014/lewin-courses-removed-1208 and http://tech.mit.edu/V134/N60/walterlewin.html. This video was formerly hosted on the YouTube channel MIT OpenCourseWare. Attribution: MIT OpenCourseWare License: Creative Commons BY-NC-SA 3.0 US To view a copy of t...
Raman spectroscopy (/ˈrɑːmən/; named after Sir C. V. Raman) is a spectroscopic technique used to observe vibrational, rotational, and other low-frequency modes in a system. It relies on inelastic scattering, or Raman scattering, of monochromatic light, usually from a laser in the visible, near infrared, or near ultraviolet range. The laser light interacts with molecular vibrations, phonons or other excitations in the system, resulting in the energy of the laser photons being shifted up or down. The shift in energy gives information about the vibrational modes in the system. Infrared spectroscopy yields similar, but complementary, information. Typically, a sample is illuminated with a laser beam. Electromagnetic radiation from the illuminated spot is collected with a lens and sent through a...